Belgian Congo, 1957 — With a whine of protest, the hardy little 2.0-liter four-cylinder struggles against its burden, and a well-laden Land Rover goes bouncing down the forest track, accompanied by singing. There are more than 30 people crammed into and on top of this unusual machine, the majority of them the diminutive people of the Mbuti tribe, colloquially known as forest pygmies. They laugh at the jostling, raising their voices in traditional hunting songs. The driver and passenger up front—two lanky Canadians—grin along with them. This is Africa. This is adventure.